Rewinding and speed-regulating mechanism for pneumatic actions for pianos, &amp;c.



A 0. NELSON. RBWINDING AND SPEED BEGULATING MEGHANISM POR PNBUMATIG ACTIONS PoR PIANos, fw.

' APPLICATION FILLD 00T. Z5, 1909. Patented 00th 11,

'2 SHEETS-SHEET 1. i

' igl, r I1-( A1 .nana-.nanceoaeaana O. NELSON. RBWINDINQ AND SPEED REGULATING MEGHANISM POR PNBUMATIG AGTIoNs'PoB PIAN os, 6m.

Patented Oct. 11, 1910.

Y APPLICATION FILED 00T. 25, 1909. 972,633,-

2 SHEETS-SHEET Z.

UNITED STATES PATENT tra i nur OSCAR NELSON, OF CI-ICAGO, LLINOIS, ASSGNQR TO J. SEEBURG PIANO COMPANY,

DE CHICAGO, ILLINOIS, A CORPORATION OF ILLINOS.

REVJINDING AND SPEED-REGULATING MECHANISM FOR PNEUMATIC ACTIONS FOR PLANOS, 85C.

Specification of Letters Patent.

Patented @eta 11, 191th Application filed ctober 25, Serial No. 524,516.

. To all whom it muy concern.'

Be it known that l, lOSCAR NELSON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Rewinding and Speed- Regulating Mechanism for Pneumatic Ac- 'tions for Pianos and the Like, of whicliithe following is a specification.

This invention 'relates to improvements in an apparatus to be used in connection with pneumatically operated musical instru* ments, and especially pianos, for regulating or controlling the speed of movement of the music-sheet and for rewinding the same, and it consists in certain peculiarities of the con struction, novel arrangement and operation of the various parts thereof, as will be hereinafter more fully set forth and specifically claimed.

The principal object of the invention is to provide a rewinding and speed regulating mechanism of the above-named character, which shall be simple and inexpensive in construction, strong, durable and eHicient in operation, and so made that the speed of the roller on which the music-sheet is wound may bfc easilv regulated and the act of rewinding the same may be readily performed.

Other objects and advantages of the invention will be disclosed in the subjoined description and explanation.

In order to enable others-skilled in the art to which this invention pertains, to make and use the same, will now proceed to describe it, referring to the accompanying drawings, in Which- Figure 1, is a view in front elevation of a portion of a piano casing showing. my' iniproved mechanism mounted thereon below the key board and the parts in position ready for winding the music-sheet from one roller therefor to the other. Fig. 2, is 'a cross-sectional view taken on line 2-2 of 'Fig 1, looking in the direction indicated by sponding parts throughout the dilfei'cnt views of the drawing.

The reference numeral 7, designates the -Yfrontlower portion of a piano casino` Jrhat is, from just above the key-board thereof,

to its base, wit-li the front wall of the casing removed to disclose the improved inechanism. Mounted on the floor tu', of the casing 7, and near one end thereof, are the power pneumatics 9, and 10, which may be of the ordinary or any preferred construction, and are employed for operating the pneumatic action of the instrument which is not herein shown, but which it will be understood is mounted Within the casing 7, above the keyboard 11, thereof and may be of any well known type.

As shown in Figs. 1, and 2, of the draw ings, the top and bottom boards 12, and 13, of the pneumatics 9, and 10, are rigidly held apart by means of upright braces 14, and 15, secured to the sides thereof near their ends and that the intervening frame 16, of each pneumatic is pivotally connected at one of its ends to the uprights 15, and has at its other end an extension 1'?, to each of which is pivotally secured at one of its ends a bar or rod 1S, the other end of each of which is jouri'ale-di the crank shaft 19, which is horizontally mounted on the upper portion of a pairofbrackets 20, which are mounted on the top board 12, of the pneumatics. The upper and lower boards 12and 13, are connected to the intervening frames 16, at the edges of the latter by means of collapsible diaphragnis 21, in the ordinary manner. Extended across the upper surface of the upper board 12, of the pneumatics, is a hollow trunk 22, which has communication through openings in the board 12, with the interior of the diaphiagius 21, and also has construction.

- provided on its central portion with a disk 32, against which a friction disk 33,`mount ed on the'winding shaft 34, contacts.

As s hown in the drawings, the winding shaft 34 is located at right angles to the crank shaft 19, and has one of its ends journaled in a suitable bearing 35, looselymountedv on the crank shaft 19, and its other end movably supported in an opening 36, in a bracket 37 ,.secured to a portion of the su porting frame 38, for the music-sheet rolers 39, a11d40, which are' journaled one above the other as is clearly shown in Fig. 1, of the drawings. Mounted on that end of the winding shaft 34, adjacent to the rollers 39, and 40, is a pinion 41, which is adapted to mesh with a gear 42, on the shaft of the roller 39, and with a pinion 43, whichis journaled on the frame 38, and bracket 37, and meshes with a gear 44, on the shaft of the roller 40. Mounted on the bracket 37, near the winding shaft 34, is a pneumatic 45, which has communication through the tube 46, with the pneumatic action and through the tube 47, with the tube leading from the tracker bar, and carries a forked arm 48, which is pivotally connected to the upper portion of the pneumatic 45,and embraces the winding shaft 34, as is clearly shown in Fi s. 1, and 3, of the drawings. The friction Aisk 33, which as before stated, contacts with the face of the disk 32, on the pulley 27, is provided on one of its surfaces With a hub extension 49, which is provided with a set screw-50, to engage the winding shaft 34, so as to fix the friction disk 33, thereon at the desired point. A spring 51, secured at one of its ends to the lower surface of the key-boardll, and depending therefrom, rests against one side of the windin shaft 34, so as to press it toward the dis 32, and thus constantly hold the friction disk 33, in .contact with the first named disk.

From the foregoing, and by reference t0 the drawings, it will be readily understood and clearly seen that when the parts are arranged as shown in Fig. 1, of the drawings, and 'power is transmitted from the motor 31, through the belt or cable 29, to the pulley 27, said pulley, as well as the disk 32, and crank shaft 19, will be rotated in which operation, it is evident that the ower pneumatics'9, and 10, will be actuatef, and through their connections therewith, the pneumatic action will be o erated. As the friction disk 33, on the Winding shaft 34, is in contact with the disk 32, it is apparent that the winding shaft will be rotated and its movement imparted through the pinion 41, and the gear 42, to the music-sheet roller 39, on which the sheet will be wound and unwound from th? roller 40, thuscausing it to pass over the tracker board 52, which is located between said rollers and may be of the ordinary orany prethat said shaft will be raised at its end ad-l jacent to the rollers and the pinion ,41, on said end thrown into engagement with the gear 43, which as before stated, meshes with the gear 44, on the shaft ofthe roller 40, and thus cause said roller to rotate. The speed of movement of the frollers 39, and 40, may be regulated by movingl the Vfriction disk 33, toward or from the crank shaft 19, as 'is'apparent In order to hold the arm 48,'and the Winding shaft 34, in their raised positions, a lever 52, is fulcrumed on the upper ortion of the trunk of the pneumatic 45, an hasat one of its ends a catch 53, to engage the to of said pneumatic, and has its other en secured to a pneumatic 54, with which a tube 55, leading from the tracker bar tube (not shown) communicates.

Having thus fully described my inven tion 'what I claim as new and desire to secure by .Letters-Patent isl. In a mechanism of the. class described, the combination with the power pneumatics, of a crank shaft journaled near the same, connections uniting the pneumatics and crank shaft, a pulley mounted on the crank shaft and having a disk at its central portion, music-sheet rollers journaled near each other, a gear on each of the shafts of said rollers, a pinion journaled near one of said gears, a winding-shaft movably mounted at its end adjacent Ato the rollers and suitabl supported at its other end near the crank shaft, a pinion on the Winding shaft to engage one of the gears of one of the rollers and the first mentioned pinion, -a friction diskmounted on the Winding shaft in contact with the disk of the pulley, and means to rotate the pulley.

2. In a mechanism of the class described,

the combination with the power pneumatics, a crank shaft journaled near the same, connections uniting the pneumatics and crank` shaft, a wheel mounted'o'n thel crank shaft,

music-sheetv rollers journaled near each other, a gear onj each of the shafts of said rollers, a pinion journaled near one of said,L

gears, a Winding'shaft movably mounted at its end adjacent to therollers and ivotall supported at its other end near't e cran shaft, a pinion on the winding shaft adapted to engage one of the gears of one of the rollers and the first mentioned pinion, a

fric-en cisk adjustably mounted on the Wmdmg Shaft m contest Wlfh. 'lle Sad Wheel, and means to lotate the Clank Sha't.

3. En a mechnsm of the dass eserbed he combination with the powe: pneumates, a crank haft journaled naar "the same, conneetons uniting che pneumatcs and crank sha; t, a Wheel mounted on the crank shaft, music-sheet reliefs journaed meer each other, a gear on each of the shafts of said l'oes, :a Winding shaft movably mounted at e end adjacent to the rolels and pfmf ally suppored at s ethe end nem bhe crankshaft, a pnen' en he wnillg she the shaf of 'the rollers, a pneunwilc mounte meer the winding SQL it, an :um pvot ally secured at one of its ends to said pneumac and engaging et s othe end lle Winding shafte a fceton dek acjustably mounted on the Winding shaft in conmet with the said Wheel: and means te 'otate the crank shaft.

OSCAR nesses CHAS,v C. TILLMAN, E. HANsmw 

